git-offload.sh

#!/bin/bash
# git-offload: a tool for shifting local commits to a new branch and pushing it
# Author: Mikayla Hutchinson <m.j.hutchinson@gmail.com>

if [ "$#" -ne 2 ]; then
	echo
	echo "Creates new branch from the current commit and pushes it to a remote"
	echo "and then resets the original branch to its upstream state."
	echo "" 
	echo "USAGE:"
	echo "    $(basename $0) remote new-branch"
	echo
	exit 1
fi

NEWREMOTE=$1
NEWBRANCH=$2
NEWUPSTREAM="$NEWREMOTE/$NEWBRANCH"

BRANCH=$(git branch 2> /dev/null)

if [ "$?" -ne 0 ]; then
	echo "not a git repository"
	exit 1
fi

BRANCH=$(echo "$BRANCH" | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/')

UPSTREAM=$(git for-each-ref --format='%(upstream:short)' $(git symbolic-ref -q HEAD))
if [ -z $UPSTREAM ]; then
	echo "branch $BRANCH has no upstream configured"
	exit 1
fi

CHANGED=$(git diff-index --name-only HEAD --)  
if [ ! -z "$CHANGED" ]; then
	echo "there are local changes, please commit"
	exit 1
fi

echo "$BRANCH $UPSTREAM -> $NEWBRANCH $NEWUPSTREAM"

git checkout -b $NEWBRANCH || exit 1
git push -u $NEWREMOTE $NEWBRANCH || exit 1
git checkout $BRANCH
git reset --hard $UPSTREAM

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